/* =========================================
   Unified Visual Standards (Design System)
   ========================================= */

:root {
  --brand-primary: #0f172a;
  --brand-secondary: #334155;
  --brand-accent: #2563eb;
  --brand-success: #10b981;

  --bg-body: #ffffff;
  --bg-surface: #f8fafc;
  --bg-surface-2: #f1f5f9;

  --text-main: #1e293b;
  --text-secondary: #64748b;
  --text-on-brand: #ffffff;

  --border-light: #e2e8f0;
  --border-medium: #cbd5e1;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  --h1: clamp(2.5rem, 5vw, 4rem);
  --h2: clamp(2rem, 4vw, 3rem);
  --h3: clamp(1.5rem, 3vw, 2rem);
  --body-lg: 1.125rem;
  --body-base: 1rem;
  --body-sm: 0.875rem;

  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  --spacing-3xl: 64px;
  --spacing-4xl: 96px;

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

  --transition-fast: 150ms ease-in-out;
  --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms ease-in-out;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-body);
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
}

img {
  display: block;
  max-width: 100%;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--brand-primary);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.02em;
}

h1 { font-size: var(--h1); font-weight: 800; }
h2 { font-size: var(--h2); }
h3 { font-size: var(--h3); }

p {
  margin-bottom: var(--spacing-md);
  color: var(--text-secondary);
}

a {
  color: var(--brand-accent);
  text-decoration: none;
  transition: var(--transition-base);
}

a:hover {
  text-decoration: none;
  color: var(--brand-primary);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 3px solid #f59e0b;
  outline-offset: 2px;
}

.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-base);
  border: 2px solid transparent;
  text-decoration: none;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  text-transform: capitalize;
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left var(--transition-slow);
}

.btn:hover::before {
  left: 100%;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background-color: var(--brand-accent);
  color: var(--text-on-brand);
  background: linear-gradient(135deg, var(--brand-accent) 0%, #1d4ed8 100%);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
  filter: brightness(110%);
  box-shadow: 0 6px 16px rgba(37, 99, 235, 0.4);
  transform: translateY(-2px);
}

.btn-secondary {
  background-color: transparent;
  color: var(--brand-primary);
  border: 1px solid var(--border-medium);
}

.btn-secondary:hover {
  background-color: var(--bg-surface-2);
  border-color: var(--text-secondary);
  color: var(--brand-primary);
}

/* Navigation */
nav {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0,0,0,0.05);
  transition: var(--transition-base);
  height: 80px;
  display: flex;
  align-items: center;
}

nav .nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

nav .logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--brand-primary);
  letter-spacing: -0.03em;
  text-transform: uppercase;
}

nav .logo a {
  color: inherit;
  text-decoration: none;
}

nav .nav-links {
  display: flex;
  gap: var(--spacing-lg);
  list-style: none;
  align-items: center;
}

nav .nav-links li {
  position: relative;
}

nav .nav-links a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: var(--spacing-xs) 0;
}

nav .nav-links a:hover {
  color: var(--brand-accent);
}

nav .nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0px;
  left: 0;
  width: 0%;
  height: 2px;
  background-color: var(--brand-accent);
  transition: width 0.3s ease;
}

nav .nav-links a:hover::after {
  width: 100%;
}

.nav-submenu {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  min-width: 180px;
  list-style: none;
  padding: var(--spacing-sm);
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 10px);
  transition: opacity 180ms ease, transform 180ms ease;
}

.has-submenu::after {
  content: '';
  position: absolute;
  left: -16px;
  right: -16px;
  top: 100%;
  height: 14px;
}

.has-submenu:hover .nav-submenu,
.has-submenu:focus-within .nav-submenu {
  opacity: 1;
  pointer-events: auto;
  transform: translate(-50%, 0);
}

nav .nav-submenu a {
  display: block;
  padding: 10px 12px;
  color: var(--text-main);
  white-space: nowrap;
}

nav .nav-submenu a::after {
  display: none;
}

nav .nav-submenu a:hover {
  background: var(--bg-surface);
  color: var(--brand-accent);
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--brand-primary);
}

.hamburger span {
  display: block;
  width: 25px;
  height: 2px;
  background-color: var(--text-main);
  margin-bottom: 5px;
  transition: var(--transition-base);
}

/* Hero / Carousel */
.carousel-section {
  position: relative;
  height: 100vh;
  min-height: 600px;
  overflow: hidden;
  margin-top: 0;
}

.carousel-container {
  position: relative;
  width: 100%;
  height: 100%;
}

.carousel-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 1s ease-in-out;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 var(--spacing-xl);
  background-color: #ffffff;
  background-size: cover !important;
  background-position: center !important;
}

.carousel-slide::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.96) 0%, rgba(255, 255, 255, 0.9) 44%, rgba(255, 255, 255, 0.72) 100%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.26), rgba(255, 255, 255, 0.46));
  z-index: 1;
}

.carousel-slide.active {
  opacity: 1;
  z-index: 2;
}

.carousel-slide .content-wrapper {
  position: relative;
  z-index: 3;
  text-align: center;
  max-width: 900px;
  animation: fadeUp 1s ease-out;
}

.carousel-slide h1,
.carousel-slide h2 {
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 800;
  margin-bottom: var(--spacing-md);
  color: var(--brand-primary);
  text-shadow: 0 2px 16px rgba(255, 255, 255, 0.85);
  line-height: 1.1;
}

.carousel-slide p {
  font-size: clamp(1.1rem, 2vw, 1.5rem);
  margin-bottom: var(--spacing-xl);
  color: var(--text-main);
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
  text-shadow: 0 1px 12px rgba(255, 255, 255, 0.85);
}

.carousel-slide .cta-buttons {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
}

.carousel-slide .btn-primary {
  color: #ffffff;
  border-color: #1d4ed8;
}

.carousel-slide .btn-secondary {
  background: rgba(255, 255, 255, 0.94);
  color: var(--brand-primary);
  border-color: var(--brand-primary);
  box-shadow: 0 4px 14px rgba(15, 23, 42, 0.12);
}

.carousel-slide .btn-secondary:hover {
  background: var(--brand-primary);
  border-color: var(--brand-primary);
  color: #ffffff;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.carousel-nav {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  display: flex;
  gap: 12px;
}

.carousel-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(15, 23, 42, 0.28);
  cursor: pointer;
  transition: var(--transition-base);
}

.carousel-dot.active {
  background: var(--brand-accent);
  transform: scale(1.2);
}

.carousel-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  width: 56px;
  height: 56px;
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(15, 23, 42, 0.18);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-base);
}

.carousel-arrow:hover {
  background: var(--brand-accent);
  border-color: var(--brand-accent);
}

.carousel-arrow:hover::before {
  border-color: #ffffff;
}

.carousel-arrow.prev { left: var(--spacing-xl); }
.carousel-arrow.next { right: var(--spacing-xl); }

.carousel-arrow::before {
  content: '';
  width: 12px;
  height: 12px;
  border-right: 2px solid var(--brand-primary);
  border-bottom: 2px solid var(--brand-primary);
}

.carousel-arrow.prev::before {
  transform: rotate(135deg);
  margin-left: 4px;
}

.carousel-arrow.next::before {
  transform: rotate(-45deg);
  margin-right: 4px;
}

/* Sections */
.company-intro-section,
.trust-grid-section,
.scenarios-section,
.news-section,
.contact-section,
.product-center-landing {
  padding: var(--spacing-4xl) 0;
}

.section-header {
  margin-bottom: var(--spacing-3xl);
  text-align: center;
}

.section-divider {
  width: 60px;
  height: 4px;
  background: var(--brand-accent);
  margin: var(--spacing-md) auto 0;
  border-radius: var(--radius-full);
}

.section-divider.light {
  background: rgba(255,255,255,0.3);
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.trust-card {
  background: var(--bg-body);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: center;
  height: 180px;
  transition: var(--transition-base);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
}

.trust-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: var(--brand-accent);
}

.trust-card img {
  max-width: 100%;
  max-height: 100%;
  opacity: 0.7;
  transition: var(--transition-base);
}

.trust-card:hover img {
  opacity: 1;
}

/* Product */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-xl);
}

.product-card {
  background: var(--bg-body);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  overflow: hidden;
  transition: var(--transition-base);
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--border-medium);
}

.product-image-container {
  background: #fff;
  padding: var(--spacing-lg);
  height: 260px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid var(--border-light);
}

.product-image-container img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  transition: transform 0.5s ease;
}

.product-card:hover .product-image-container img {
  transform: scale(1.05);
}

.product-info {
  padding: var(--spacing-lg);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.product-specs {
  list-style: none;
  margin: 0 0 var(--spacing-lg) 0;
  padding: var(--spacing-md);
  background: var(--bg-surface);
  border-radius: var(--radius-md);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-sm);
}

.product-specs li {
  font-size: 0.85rem;
  color: var(--text-main);
}

.product-specs li strong {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 2px;
}

.scenarios-grid,
.category-grid,
.news-grid {
  display: grid;
  gap: var(--spacing-lg);
}

.scenarios-section {
  background: var(--bg-body);
}

.scenarios-container {
  max-width: none;
  padding-left: 12px;
  padding-right: 12px;
}

.scenario-showcase-header {
  text-align: center;
  max-width: 1120px;
  margin: 0 auto var(--spacing-3xl);
}

.scenario-eyebrow {
  color: #40535a;
  font-size: 1.35rem;
  font-weight: 500;
  letter-spacing: 0;
  text-transform: uppercase;
  margin-bottom: var(--spacing-lg);
}

.scenario-showcase-header h2 {
  color: #10282d;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 4rem;
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: 0;
  margin-bottom: 0;
}

.scenarios-grid {
  display: flex;
  align-items: stretch;
  grid-template-columns: none;
  gap: 16px;
  margin-top: var(--spacing-xl);
  min-height: 520px;
}

.scenario-card {
  flex: 1 1 0;
  min-width: 0;
  height: 520px;
  border-radius: var(--radius-md);
  overflow: hidden;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  background-image: linear-gradient(rgba(15, 23, 42, 0.12), rgba(15, 23, 42, 0.18)), var(--scenario-image);
  background-position: center;
  background-size: cover;
  transition: flex 560ms cubic-bezier(0.22, 1, 0.36, 1), filter 300ms ease, transform 300ms ease;
  box-shadow: none;
  cursor: pointer;
}

.scenario-card.active {
  flex-grow: 5;
  cursor: default;
}

.scenario-card:not(.active) {
  filter: saturate(0.82) brightness(0.88);
}

.scenario-card:not(.active):hover,
.scenario-card:not(.active):focus-visible {
  filter: saturate(1) brightness(0.96);
}

.scenario-content {
  color: var(--text-on-brand);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-lg);
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 260ms ease, transform 360ms ease;
  pointer-events: none;
  text-align: center;
  width: min(420px, 80%);
}

.scenario-card.active .scenario-content {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.scenario-content h3 {
  color: var(--text-on-brand);
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: 0;
  margin-bottom: 0;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.scenario-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 180px;
  min-height: 52px;
  border: 1px solid rgba(255, 255, 255, 0.9);
  border-radius: var(--radius-sm);
  color: var(--text-on-brand);
  font-size: 1rem;
  font-weight: 500;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(4px);
}

.scenario-link:hover,
.scenario-link:focus-visible {
  color: var(--brand-primary);
  background: rgba(255, 255, 255, 0.92);
}

/* Product Center */
.category-grid {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  margin-bottom: var(--spacing-4xl);
}

.category-card {
  background: var(--bg-body);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  overflow: hidden;
  transition: var(--transition-base);
  text-align: center;
}

.category-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.category-image {
  height: 220px;
  overflow: hidden;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
}

.category-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 12px;
}

.category-card h3 {
  font-size: 1.25rem;
  margin: var(--spacing-md) 0 var(--spacing-sm);
  color: var(--brand-primary);
}

.category-card p {
  padding: 0 var(--spacing-md);
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.category-card .btn {
  margin: var(--spacing-md);
}

.product-browser {
  margin: 0 0 var(--spacing-4xl);
  padding: var(--spacing-xl);
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
}

.product-browser-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.product-browser-header h2 {
  margin-bottom: 0;
}

.eyebrow {
  margin-bottom: var(--spacing-xs);
  color: var(--brand-accent);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.product-browser-empty {
  color: var(--text-secondary);
  margin: 0;
  padding: var(--spacing-lg);
  background: var(--bg-body);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
}

.product-browser-empty.error {
  color: #b91c1c;
}

.product-browser-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--spacing-lg);
}

.product-browser-grid .product-card {
  border-radius: var(--radius-md);
}

.product-browser-grid .product-image-container {
  height: 220px;
}

.product-browser-grid .product-info h4 {
  overflow-wrap: anywhere;
}

.product-detail-panel {
  background: var(--bg-body);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
}

.back-link {
  display: inline-flex;
  margin-bottom: var(--spacing-lg);
  color: var(--brand-accent);
  font-weight: 600;
  text-decoration: none;
}

.back-link:hover {
  text-decoration: underline;
}

.product-detail-layout {
  display: grid;
  grid-template-columns: minmax(240px, 0.8fr) minmax(0, 1.2fr);
  gap: var(--spacing-xl);
  align-items: start;
}

.product-detail-image {
  min-height: 300px;
  background: #fff;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-lg);
  color: var(--text-secondary);
}

.product-detail-image img {
  max-width: 100%;
  max-height: 320px;
  object-fit: contain;
}

.product-parameter-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-lg);
}

.product-parameter-list div {
  display: grid;
  grid-template-columns: minmax(150px, 0.45fr) minmax(0, 0.55fr);
  gap: var(--spacing-md);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
}

.product-parameter-list dt {
  color: var(--text-secondary);
  font-weight: 700;
}

.product-parameter-list dd {
  color: var(--text-main);
  overflow-wrap: anywhere;
}

.featured-products h3 {
  font-size: 1.5rem;
  margin: var(--spacing-2xl) 0 var(--spacing-lg);
  color: var(--brand-primary);
}

.breadcrumb {
  background: var(--bg-surface);
  padding: var(--spacing-md) 0;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.breadcrumb a {
  color: var(--brand-accent);
  text-decoration: none;
}

.breadcrumb a:hover {
  text-decoration: underline;
}

/* News */
.news-grid {
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
}

.news-card {
  background: var(--bg-body);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-base);
  display: flex;
  flex-direction: column;
}

.news-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.news-image {
  height: 200px;
  overflow: hidden;
}

.news-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.news-content {
  padding: var(--spacing-lg);
}

.news-content h3 {
  font-size: 1.125rem;
  margin-bottom: var(--spacing-sm);
  line-height: 1.4;
}

/* Contact */
.contact-section {
  background-size: cover;
  background-position: center;
  position: relative;
}

.cta-band {
  background: var(--brand-primary);
  color: white;
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  text-align: center;
  margin-bottom: var(--spacing-xl);
  box-shadow: var(--shadow-lg);
}

.cta-band .trust-points {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0 0;
}

.cta-band .trust-points li {
  color: rgba(255,255,255,0.9);
  margin-bottom: 0.5rem;
}

.contact-form {
  background: var(--bg-body);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  max-width: 600px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: var(--spacing-md);
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  color: var(--brand-primary);
}

.form-group label[for="privacy-consent"] {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 0;
  font-weight: 500;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.875rem;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: 1rem;
  transition: var(--transition-base);
}

.form-group input[type="checkbox"] {
  width: 1.05rem;
  min-width: 1.05rem;
  height: 1.05rem;
  margin-top: 0.2rem;
  padding: 0;
}

.form-group textarea {
  min-height: 140px;
  resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--brand-accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.error-message {
  display: none;
  color: #b91c1c;
  font-size: 0.85rem;
  margin-top: 0.25rem;
}

.form-group.invalid .error-message {
  display: block;
}

.form-group.invalid input,
.form-group.invalid textarea {
  border-color: #dc2626;
}

.form-status {
  margin-top: 0.75rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.form-status.success {
  color: #047857;
}

.form-status.error {
  color: #b91c1c;
}

/* Footer */
footer {
  background: var(--brand-primary);
  color: rgba(255,255,255,0.7);
  padding: var(--spacing-xl) 0;
  text-align: center;
  font-size: 0.9rem;
  border-top: 1px solid rgba(255,255,255,0.1);
}

footer a {
  color: #e2e8f0;
  margin: 0 0.65rem;
}

footer a:hover {
  color: #ffffff;
}

/* Animations */
.animate-on-scroll {
  opacity: 0;
  transition: all 1s ease;
}

.animate-on-scroll.visible {
  opacity: 1;
}

.fade-up.visible {
  animation: fadeUp 1s ease forwards;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Responsive */
@media (max-width: 1024px) {
  nav {
    height: 72px;
  }

  nav .nav-container {
    padding: 0 var(--spacing-md);
  }

  nav .nav-links {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: var(--bg-body);
    flex-direction: column;
    align-items: stretch;
    padding: var(--spacing-lg) var(--spacing-md);
    box-shadow: var(--shadow-lg);
    gap: var(--spacing-md);
    border-top: 1px solid var(--border-light);
  }

  .nav-submenu {
    position: static;
    min-width: 0;
    width: 100%;
    padding: 0 0 0 var(--spacing-md);
    background: transparent;
    border: 0;
    box-shadow: none;
    opacity: 1;
    pointer-events: auto;
    transform: none;
  }

  .has-submenu:hover .nav-submenu,
  .has-submenu:focus-within .nav-submenu {
    transform: none;
  }

  nav .nav-submenu a {
    padding: var(--spacing-xs) 0;
    color: var(--text-secondary);
    white-space: normal;
  }

  nav .nav-links.active,
  nav .nav-links.open {
    display: flex;
  }

  .mobile-menu-toggle {
    display: block;
  }

  .carousel-slide h1,
  .carousel-slide h2 {
    font-size: 3.5rem;
  }
}

@media (max-width: 768px) {
  :root {
    --spacing-4xl: 48px;
    --spacing-3xl: 32px;
    --spacing-xl: 32px;
    --spacing-lg: 16px;
  }

  body {
    font-size: 1rem;
  }

  .container {
    padding: 0 var(--spacing-md);
  }

  .carousel-slide h1,
  .carousel-slide h2 {
    font-size: 2.5rem;
  }

  .carousel-section {
    min-height: 640px;
  }

  .carousel-slide {
    padding: 0 var(--spacing-md);
  }

  .carousel-slide .content-wrapper {
    width: 100%;
    max-width: 34rem;
  }

  .carousel-slide p {
    font-size: 1rem;
    margin-bottom: var(--spacing-lg);
  }

  .carousel-arrow {
    display: none;
  }

  .carousel-slide .cta-buttons {
    flex-direction: column;
    width: 100%;
    max-width: 300px;
    margin: 0 auto;
    gap: var(--spacing-md);
  }

  .btn {
    width: 100%;
    white-space: normal;
  }

  .product-grid,
  .product-browser-grid,
  .news-grid,
  .category-grid {
    grid-template-columns: 1fr;
  }

  .scenarios-container {
    padding-left: var(--spacing-md);
    padding-right: var(--spacing-md);
  }

  .scenario-showcase-header {
    margin-bottom: var(--spacing-xl);
  }

  .scenario-eyebrow {
    font-size: 0.9rem;
    line-height: 1.7;
  }

  .scenario-showcase-header h2 {
    font-size: 2.5rem;
  }

  .scenarios-grid {
    min-height: 560px;
    flex-direction: column;
    gap: 12px;
  }

  .scenario-card {
    height: auto;
    min-height: 128px;
    flex: 1 1 0;
  }

  .scenario-card.active {
    flex-grow: 3.2;
  }

  .scenario-content h3 {
    font-size: 1.7rem;
  }

  .scenario-link {
    min-width: 150px;
    min-height: 46px;
  }

  .product-browser {
    padding: var(--spacing-md);
  }

  .product-browser-header {
    align-items: stretch;
    flex-direction: column;
  }

  .product-specs,
  .product-detail-layout,
  .product-parameter-list div {
    grid-template-columns: 1fr;
  }

  .product-image-container,
  .product-browser-grid .product-image-container {
    height: 220px;
  }

  .product-detail-image {
    min-height: 220px;
  }

  .trust-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
  }

  .trust-card {
    height: 120px;
    padding: var(--spacing-md);
  }

  .mobile-menu-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 44px;
    height: 44px;
  }

  nav .nav-links.open {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: #fff;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    padding: var(--spacing-lg) var(--spacing-md);
  }

  nav .nav-links li,
  nav .nav-links a,
  .has-submenu {
    width: 100%;
  }

  nav .nav-links a {
    display: block;
    padding: 0.35rem 0;
  }

  .has-submenu::after {
    display: none;
  }

  .nav-submenu {
    margin-top: 0.35rem;
  }

  .contact-form {
    padding: var(--spacing-lg);
  }

  .cta-band {
    padding: var(--spacing-lg);
  }

  footer p {
    overflow-wrap: anywhere;
  }
}

@media (max-width: 400px) {
  .carousel-slide h1,
  .carousel-slide h2 {
    font-size: 2rem;
  }

  .carousel-nav {
    bottom: 20px;
    gap: 10px;
  }

  .scenario-showcase-header h2 {
    font-size: 2rem;
  }

  .scenario-content h3 {
    font-size: 1.4rem;
  }

  .trust-grid {
    grid-template-columns: 1fr;
  }
}